JPS55127731A - Logical operation circuit - Google Patents

Logical operation circuit

Info

Publication number
JPS55127731A
JPS55127731A JP3442979A JP3442979A JPS55127731A JP S55127731 A JPS55127731 A JP S55127731A JP 3442979 A JP3442979 A JP 3442979A JP 3442979 A JP3442979 A JP 3442979A JP S55127731 A JPS55127731 A JP S55127731A
Authority
JP
Japan
Prior art keywords
logical operation
operation circuit
level
time
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3442979A
Other languages
Japanese (ja)
Inventor
Minoru Enomoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3442979A priority Critical patent/JPS55127731A/en
Publication of JPS55127731A publication Critical patent/JPS55127731A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
    • H03K19/082—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using bipolar transistors
    • H03K19/088—Transistor-transistor logic

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To obtain a logical operation circuit where a diode is connected between the input point of an inverter transistor and the input terminal for the purpose of shortening the rise time and the fall time of the output signal of the logical operation circuit. CONSTITUTION:When input signal iN becomes Low, point C is lowered to VBEoff or less the due to clamp diodes D4 and D5 independently of transistors TrQ1 and Q2. Then, the output signals starts rising independently of the time constant of resistance R4. Consequently, simultaneously with switching of input signal iN from the Hi level to the Low level, the output signal starts rising immediately from the Low level to Hi level. At this time, forward voltage VF of Schottky barrier diodes D4 and D5 must be the saturation voltage of output inverter transistor TrQ3, namely, cut-off voltage (VBEoff) of TrQ3 or less.
JP3442979A 1979-03-26 1979-03-26 Logical operation circuit Pending JPS55127731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3442979A JPS55127731A (en) 1979-03-26 1979-03-26 Logical operation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3442979A JPS55127731A (en) 1979-03-26 1979-03-26 Logical operation circuit

Publications (1)

Publication Number Publication Date
JPS55127731A true JPS55127731A (en) 1980-10-02

Family

ID=12413963

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3442979A Pending JPS55127731A (en) 1979-03-26 1979-03-26 Logical operation circuit

Country Status (1)

Country Link
JP (1) JPS55127731A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830233A (en) * 1981-08-17 1983-02-22 Fujitsu Ltd Transistor circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54156463A (en) * 1978-05-30 1979-12-10 Nec Corp Logic circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54156463A (en) * 1978-05-30 1979-12-10 Nec Corp Logic circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830233A (en) * 1981-08-17 1983-02-22 Fujitsu Ltd Transistor circuit

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